FCEUXD by BBitmaster and Parasyte has a Trace Logger, a built-in Hex Editor, a Name Table Viewer, Code/Data Logger, Inline Assembler, and Game Genie Decoder/Encoder in addition to the Debugger and PPU Viewer from FCEUD.
Note: this version has been….

This is a modified SDL version of VBA to support advanced hacking features such as tracing, breakpoints and more.
Note: This is completely command-line driven. Be sure to refer to the readme for instructions.

It can break down an FDS (Famicom Disk System) disk image, and can merge the files back together when you’re done.
This version will name the extracted files according to the file ID number in the internal header.

Lunar Compress is a decompression and recompression DLL written in C for a few compression formats that have been known to show up in certain SNES/GB games. It’s intended primarily as a programmer’s resource, so it even includes a few commo….

This is a simple program that will add space to a NES rom, i.e. expand it. This program only adds space to a NES ROM. You will still need the knowledge of mappers and assembly necessary to take advantage of this space.
Works on many mappers, but s….

One of the only psx assemblers out there. It builds psx exe files and raw binaries using assembly code.
This is an unofficial build by Gemini which should fix the “Load error: no DOS memory” error once and for all.